Stapling machine



July 31, 1945.

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R mv N U m+ H 5 O INVENTOR 21 W MW ATTORNEY Patented July 31, 1945UNITED STATES PATENT OFFICE 2,380,785 STAPLING MACHINE Richard Percoco,Mamaroneck, N. Y.

Application January 7, 1944, Serial No. 517,311

7 Claims.

My invention relates to stapling machines and has particular referencesto machines for stitching together paper and similar materials by meansof wire staples.

My invention has for" its object to provide a stapling machine of asimple and durable construction, reliable in operation, and which willbe suitable for hard service and rough treatment.

Another object of my invention is to provide means to insure accurateand satisfactory driving of the staples regardless of the conditionofthis purpose a part or block which is normallypositioned at the frontend for holding the last staple directly under the driving bar. Theblock can be moved outward and upward by a single movement of a frontslide, thereby exposing the staples.

Another object of my invention is to provide means to release springpressure on the staples in the staple magazine when it is desired toopen the front end of the machine. I provide for this purpose a slide inthe magazine with a springoperated hook, which automatically engages ashoulder at the rear of the magazine when the slide is moved back, thehook being easily releasable by pressing it downward.

Another object of my invention is to provide means to limit themovements of the main plunger in such a manner that the pressure isdistributed between the upper and lower ends of the plunger therebypreventing bending of the plunger when it is driven very hard.

Another object of my invention is to provide means to adjust the machinefor staples of different thickness, with the minimum of changes orreplacements.

Still another object of my invention is to provide means for a simplekCODVGI'SiOII of my machine for foot power operation.

My invention- Fig. 1 is a sectional elevational view of my machine;

Fig. 2 is atop plan view of the same partly in section;

Fig. 3 is a front view of the machine;

Fig. 4. is a detail view of a locking device;' Fig. 5 is a front view ofa staple closing Fig. 6 is a side view of the same; Fig. 7 is anelevational view {of the machine, showing the closing fork in a raisedposition;

fork;

Fig. 8 is a side view of a staple holding party Fig. 9 is a front viewof the same;

Fig. 10 is a developed view of a latch for a staple slide. 5

Fig. 11; is a detail sectional view taken on the line ll-H of Fig. 3. v

My stapling machine comprises a bar I shaped to support staples 2.Spacers 3 are attached to the sides of the bar of a thickness,corresponding to the thickness of the staples, guiding strips 4 beingattached to the spacers, forming a magazine for the staples. The stripsare bent or folded at the top over the bar I, leaving a clearance l fora pin 8 of a staple pusher 9. The head of the pin or bolt ii is made inthe shape of a hook, engaging arounded middle portion of a lockingmember It, made of sheet metal and shown in a developed or flattenedform in Fig. 10. The locking member is provided with a tongue II whichis bent inwardly, passing through a slot l2 and forming a handle for themember. The wide portion of the locking member is provided with a hookl3for engaging the rear edges of the strips 4 whenit is desired to holdthe staple pusher in an inoperative position. The locking member isreleased by depressing the tongue i I, thereby rotating the member inits bearing in the hook 8 and raising the hook I 3 from the edges of thestrips. 7

The staple pusher 9 is urged forward by a clock spring l5 mounted on apin it passing through walls ll, l8 of a head or box, generallyindicated are therefore prevented from moving forward by angular slots26 in a slide 21, shown in detail in Figs. 6 and 11 since the outwardmovement, as shown in Fig. 1, can take place only as a part of thedownward movement. The slide 21 is made of sheet metal bent in the formof a U-shaped yoke, placed between the walls I7, I8. The slide isprovided with enlarged portions 3| for the'slots 26 and with a lip 3|for theslots 25 and with a lip 32 at the front for manually moving theslide up or down. Flanges i3 at the front edges of to pedals.

the slide slidably engage the edges of the walls l1, 18. The slide isguided by a pin 34 passing through elongated slots 35 in the sides ofthe slide and fastened in the walls l1, IS. The upper ends of the sidesof the slide are provided with curved projections 31, frictionallyengaging the walls [1, l8 when the slide is in its operative position asshown in Figs. 1 and 3, and extending beyond the upper edges of thewalls when the slide is raised into an inoperative position as shown inFig. 7.

For loading the staples into the magazine, the slide is raised upward bypressing on the lip 32. The lower edges of the slots 25, bearing againstthe pins 24, will force the plates 23 outward until the pins reach theends of the slots, bringing the plates in front of the walls l1, I8.With the further upward movement of the slide, the plates will be alsoraised upward along the front edges of the walls into an inoperativeposition as shown in Fig. 7. The slide is held in this position by theprojections 21 engaging the upper edges of the .walls l1, 18.

A staple driving bar 45 is slidably supported beplunger is moveddownward but is caught if the plunger is released, preventing theplunger from returning into its upper inoperative position. Uponcompletion of the downward stroke of the plunger, the lug 1| passesunder the bar 54 and the latter is moved into its original position bythe spring 89. The lug then slides over the smooth side of the bar whenthe plunger is moved upward, depressing the bar to one side against thepressure of the spring 59. The lug 11 passes above the bar 64, releasingthe latter to be returned into its original position by the spring 69.

It will be understood that various features and principles of each ofthe embodiments of the invention above described or referred to may beutilized or substituted in the other embodiment.

tween the walls l1, l8, slidably fitted in corresponding slots in thewalls, The upper end of the bar 45 is loosely supported on a pin 45,extending from a plunger 41. The plunger slides between liners 48 at thesides of the walls I1, I8, the front ends of. the liners being bentover, forming flanges 50 for guiding the front side of the plunger. Therear side of the plunger is guided by additional liners 5|. The plungerhas a bore 52 for a spring 53, supportedon a pin 54 extending from acrossbar 55 fastened to the walls l1, l8. The down- While the inventionhas been described in detail with respect to certain particularpreferred examples, it will beunderstood by those skilled in the artafter understanding the invention, that various changes and furthermodifications may be made without departing from the spirit and scope ofthe invention, and it is intended therefore in the appended claims tocover all such changes and modifications.

What is claimed as new and desired to be secured by Letters Patent is: Y4

1.- A stapling machine comprising a box; a plunger slidably supported inthe box; means to guide the plunger; a pin fitted transversely into theupper portion of the plunger; a staple driver having a hole at the topengaging the one end of the pin; means to feed staples under the stapledriver; a transverse member in the box for abutward movement of theplunger is limited by the rear end of the pin engaging a pin 51 fittedbetween the walls l1, IS. A short pin 58 is fitted in the lower portionof the plunger and limits its upward movement by engaging the pin 51. Asecond pin 59 may be provided between the walls I1, 18 as an addedstopping means for the pin.

It is important that the driving bar should The plunger in my machinedoes not touchthe bottom bar and cannot damage the latter, the shocksbeing taken by replaceable pins 45, 58, 51, 59.

A head-50 may be provided on top of the plunger for manual operation,also a hole 5| fora pin 62, shown in dotted lines in Fig. 3, forconnection A locking bar 63 is provided to prevent return movement ofthe plunger before its operating stroke is completed. The bar 53 is madeof a metal strip, bent at right angles along its length and slidablymounted on pins 65, 85 supported in the walls I1, l8. The ends of thebar are curved at 61, 88, forming convex portions, resting against theinner sides of the walls 11, I8. A spring 69 urges the upper end of thebar against the wall. Teeth 16 are provided in the other side of the barfor 8. lug 11, extending from the pin 58.

The lug 1| slides over the teeth 10 when the ting the other end of thepin at the end of the operating stroke of the plunger; and a second pinextending from the side of the plunger for engaging the transversemember at the end of the inoperating stroke of the plunger.

2. A stapling machine comprising a box; a plunger slidably supported inthe box; means to guide the plunger; a staple driver supported on theplunger, the box having means to guide the staple driver; means to feedstaples under. the staple driver; a slide slidably supported in front ofthe staple driver; a pin supported in the box passing through anelongated slot in the slide; a member at the lower end of the slide forabutting the staples for retaining the last staple under the stapledriver; and a lug on the slide for manually moving the slide upward forraising the staple retaining means above the staples.

3. A stapling machine comprising a box; a plunger slidably supported inthe box; means to guide the plunger; a staple driver supported ontheplunger, the box having means to guide the staple driver; means tofeed staples under the staple driver; a slide in front of the stapledriver; means to slidably support the slide at the walls of the box; amember movably supported at the lower end of the slide abutting theoutermost staple in its operative position under the staple driver whenthe slide is in an 1 operative position; and means at the slide formoving, the member outward inresponse to the slide being raised upwardthereby exposing the .staples.

4. A stapling machine comprising a box; a plunger slidably supported inthebox; means to guide the plunger; a staple driver supported on theplunger, the box having means to guide the staple driver; means to feedstaples under the staple driver; a slide in front of the staple driver;means to ,slidably support the slide at the walls of the box, means onthe slide for manually moving the slide upward; a member movablysupported at the lower end of the slide for abutting the staples underthe staple driver; means to prevent the staple abutting member frommoving downward and outward and means to render the staple abuttingmember operative for outward and downward movement in response to theslide being raised for exposing the staples.

5. A stapling machine comprising a box; a plunger slidably supported inthe box; means to guide the plunger; a staple driver supported on theplunger, the box having means to guide the staple driver; means to feedstaples under the staple driver; a slide in front of the staple driver;means to slidably support the slide at the walls of the box; means onthe slide for manually moving the slide upward; a member movablysupported at the lower end of the slide for abutting the staples underthe staple driver; and camshaped portions at the lower end of the slidefor moving the member outward when the slide with the member is raised.

6. A stapling machine comprising a box; a plunger slidably supported inthe box; means to guide the plunger; a staple driver supported on theplunger, the box having means to guide the staple driver; means to feedstaples under the staple driver; a slide in front of the staple driver;

means to slidably support the slide at the walls of the box, a lug onthe slide for manually moving the slide; a member movably supported atthe lower end of the slide for abutting the staples under the stapledriver; means on the slide to move the member outward and upward inresponse to the slide being raised for exposing the staples; and meansto yieldably retain the slide in the raised position.

7. A stapling machine comprising a box; a plunger slidably supported inthe box; means to guide the plunger; a staple driver sup-ported on theplunger, the box having means to guide the staple driver; means to feedstaples under the staple driver; a slide in front of the staple driver;means to slidably support the slide at the walls of the box, means onthe slide for manually moving the slide upward; a member movablysupported at the lower end of the slide forming a stop for the staplesunder the staple driver; the member being formed of two bars connectedtogether by pins; the slide having inclined slots for the pins withcam-shaped edges for moving the member outward when the slide is raisedthereby exposing the staples.

RICHARD A. PERCOCO.

